WO2000054889A1 - Jig cleaning - Google Patents
Jig cleaning Download PDFInfo
- Publication number
- WO2000054889A1 WO2000054889A1 PCT/GB2000/000947 GB0000947W WO0054889A1 WO 2000054889 A1 WO2000054889 A1 WO 2000054889A1 GB 0000947 W GB0000947 W GB 0000947W WO 0054889 A1 WO0054889 A1 WO 0054889A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- jig
- articles
- article
- surface coating
- vibration
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/082—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/06—Suspending or supporting devices for articles to be coated
Definitions
- the present invention relates to apparatus for coating articles and primarily, but not exclusively to apparatus for coating metal articles by dipping, spraying, powder coating, and similar processes to coat the surface of an article with a non conductive surface covering to form a protective coating on the article.
- each of the articles are suspended or otherwise attached to a jig and moved into a treatment chamber in which they are coated.
- one method of cleaning include heat treatment of the jig to melt the coating which may then be brushed off for example by wire brushes.
- an apparatus for removing surface coating material from a jig adapted to carry one or more articles said apparatus including vibration means adapted to vibrate the jig and cause relative movement between the jig and the or each article carried thereby such movement causing removal of sufficient surface coating from the jig to enable an electrical connection between the jig and the article.
- said vibration means may be provided in a part of a coating apparatus adapted to lift and/or convey a jig loaded with articles to be coated towards a treatment bath.
- said vibrating means is provided on a jig support so that when the jig is supported and having already been loaded with articles to be treated it is vibrated causing relative movement between the articles and the jig which relative movement causes the surface coating on the jig to be removed in the area of contact between the jig and the articles supported thereby.
- the frequency and the amplitude of vibration may be varied depending on the weight of the articles and the materials from which they are made and the length of time for which they are subject to vibration may also be altered depending on the criteria of removing sufficient surface coating from the jig to enable satisfactory electrical contact between the jig and the articles supported thereby.
- the above described apparatus for removing surface coating from a jig is a considerable improvement of known jig cleaning techniques particularly, when the vibration means can be incorporated in an automatic conveying apparatus since the hitherto necessary step of removing the jig from the treatment path and subjecting it to prolonged heat treatment, followed by mechanical cleaning can be avoided.
- the jig may then be reloaded with new untreated articles and the jig and articles supported thereto subjected to vibration in their conveyed path from a loading area a treatment area.
- the automatic conveying apparatus may be an indexing conveyor arranged such so that there is movement along a conveying path for a period of time followed by a non movement time.
- the non movement time may be used to subject the jig and articles to vibration.
- the jig and the articles may be subjected to two vibration treatments possibly, at different amplitudes, different frequency of vibration and for a different frequency of time.
- the articles may be subjected to vibration whilst they are being moved along the conveying path.
- a method of removing surface coating for an article supporting jig comprising loading one or more articles to be treated on the jig and subjecting the jig to vibration to cause relative movement between the articles and the jig to abrade or otherwise remove surface coating on the jig in the area of contact between the jig and the or each article supported thereby.
- FIGURE 1 is view of part of a jig with an article supported thereby.
- FIGURE la is a further view of a support bar
- FIGURE 2 is a detailed view showing the area of contact between the jig and the article.
- FIGURE 3 illustrates a complete jig with articles supported therefrom on a conveying means
- FIGURE 4 illustrates a vibrating apparatus supporting jig carrying bars.
- FIGURE 5 is a schematic illustration of a treatment system.
- Figure 1 illustrates a support rod 10 to which is secured a plurality of hooks such as those shown at 11.
- the bars 10 may be of considerable length for example at least 1 metre and a large number of hooks 11 will be secured thereto, each of the hooks 11 being adapted to support an article such as the article shown at 12.
- the article 12 may, for example, be a metal pressing which it is required to coat with paint to provide not only a protective coating to the article 12 but also possibly to improve its appearance.
- the complete jig is vibrated by a vibrating device, the amplitude and frequency of the vibration being determined, at least in part, by the weight of the article 12 and the material from which it is made. Vibration will cause relative movement of the article 12 in the hook 11 and the edges of the part of the article 12 in contact with the hook 11 will cause abrasion of the surface coating until metal to metal contact is possible.
- the support bar 10 has a bent end region 10a which locates on a V shaped support 22 which can also been send in Figure 3.
- the bent portion 10a not only helps to locate the support bar 10 on the jig but also is inclined so that the hooks 11 project forwardly. This helps to maintain the articles 12, particularly when light in weight, from falling off the hooks 11.
- Figure 2 shows an enlarged view of the hook 11 and the article 12 and the areas 15 on the hook 11 are contacted by the edge areas 16 on the article 12 and after vibration the cleaning of the hook 11 can be seen. It has been found in practice that a vibration time of approximately two to six minutes has been found effective to clean the hooks 11 sufficiently to provide electrical contact between articles 12 and the hooks 11.
- Figure 3 shows a complete jig 20 which is provided with a plurality of bars 21 secured thereto, the bars having V shaped separating structures 22 and between which bars 21 can be supported the support bar 10. It can be seen from Figure 3 that a large number of support bars 10 may be provided on a single jig thereby enabling a large number of articles 12 to be treated at the same time.
- the jig 20 is suspended from a pair of carrier bars 25 which have a pair of T bars 27 which can be engaged or disengaged with a carrier member 24 which is moved along a conveyor track 26.
- the T bar connection 27 and carrier 24 enable the conveyor system to pick up the jig 20 and deposit it at any one of a different number of stations.
- the vibrating station has a pair of spaced support members 28, one of which is shown, supporting the ends of the two carrier bars 25. It will be appreciated that there will be another support member 28 to support the other ends of the carrier bars 25. It is further envisaged that the carrier bars 25 maybe provided with transverse members and it is possible that the ends of the transverse members can be supported by the support member 28 so that the jig is supported from its sides rather than at each end.
- the vibrating station will necessarily have a substantial height so that the jig is freely supported from the upper end thereof and a vibrating means 29 having a power lead 30 is shown attached to the support member 28 so that the vibration from the vibrating means 29 is transmitted through the support member 28 carrier bars 25 to the entire jig.
- rubber insulating blocks 30 support the support member 28 from the base 32.
- the vibrating means 29 maybe electrically powered as shown in Figure 4 or if the apparatus is situated in an hazardous area it may be pneumatic hydraulic.
- control means may be provided to alter the frequency of vibration, the amplitude of vibration and furthermore timing means maybe provided so that a set time can be given for vibration to take place to produce the desired removal of surface coating from the hooks 11 without causing wear to the hooks themselves.
- the eccentricity can be increased or decreased whereby increasing or decreasing the amplitude of vibration, the speed of rotation may be increased or decreased thereby altering the frequency of vibration. It will be appreciated that in order to produce the desired effect, the nature of the articles being and their weight and material may dictate different vibration speeds and amplitude.
- more than one vibrating station maybe provided and furthermore, in alternative systems the articles maybe vibrated on a jig during movement along the conveying means.
- the carrier member that supports the carrier bars 25 will be well insulated by rubber mountings for example to prevent the vibration being transmitted to the conveying means 26.
- the through bore is likely to have relatively sharp edges which contributes significantly to the ability of the relative movement between the article 12 and the hook 11 to cause erosion of the surface material provided on the hook 11 of the jig 20. Vibration of the jig for a pre-determined length of time will be sufficient to ensure that there is adequate electrical connection between each of the articles 12 suspended from the hooks 11 of the jig 20 for a current to pass there through and enable the treatment to be carried out successfully.
- a first treatment bath is shown at 35 in which the jigs are immersed and is normally provided with a cleaning fluid so that the articles to be plated are de-greased or otherwise cleaned.
- Further treatment baths are shown at 36 and 37 which may comprise the surface coating treatment and the jigs are then removed by the conveying means 26 having a drying station 38.
- An unloading and loading station is shown at 39 where the jigs maybe removed from the conveying system so that operatives may unload the articles that have been plated and reload the jigs with articles to be treated.
- the bars for supporting the articles will have been coated with surface material in the baths 36 and 37 and they are then moved to a vibrating station 40 so that prior to immersion in the treatment baths electrical contact between the articles to be plated and the jig is possible thus the current passing through the jig and through the treatment bar enables the articles to be provided with a surface coating.
- the apparatus and method of the present invention provides a very considerable improvement of the process as a whole by providing a simple and very efficient manner of cleaning the jigs and also obviously the need for a large number of extra jigs to be made. Furthermore, particularly when the vibration means is activated whilst the jigs are being conveyed from a loading bay, to a surface treatment bath the extra time taken to clean the jig compared with the process as a whole may be negligible.
- a still further advantage of the present invention is that because the paint or other material does not have to be removed from the remainder of the ig since, the relative vibration between the jig and the articles cleans only the area of contact between the article and the jig.
- surface coating is applied only to the articles since the jig will already be coated with surface coating, from the area of contact with the article with paint or other surface coating. This results in a considerable saving in the surface coating material.
- the apparatus shown is merely an example of how the invention can be put into effect and the vibration means may be sited anywhere that is suitable providing it is capable of causing relative movement between the jig and the article supported thereby sufficient to cause removal of part of the surface coating on the jig.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0121756A GB2366530B (en) | 1999-03-18 | 2000-03-17 | Jig cleaning |
EP00912746A EP1161304A1 (en) | 1999-03-18 | 2000-03-17 | Jig cleaning |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9906136.8 | 1999-03-18 | ||
GBGB9906136.8A GB9906136D0 (en) | 1999-03-18 | 1999-03-18 | Jig cleaning |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000054889A1 true WO2000054889A1 (en) | 2000-09-21 |
Family
ID=10849809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2000/000947 WO2000054889A1 (en) | 1999-03-18 | 2000-03-17 | Jig cleaning |
Country Status (4)
Country | Link |
---|---|
US (1) | US20020137442A1 (en) |
EP (1) | EP1161304A1 (en) |
GB (2) | GB9906136D0 (en) |
WO (1) | WO2000054889A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2374304A (en) * | 2001-04-10 | 2002-10-16 | Protective Finishing Group Ltd | Support member for electrostaic coating |
GB2380437A (en) * | 2001-10-03 | 2003-04-09 | Protective Finishing Group Ltd | Support member for electrostatic coating |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140039693A1 (en) * | 2012-08-02 | 2014-02-06 | Honeywell Scanning & Mobility | Input/output connector contact cleaning |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4069790A (en) * | 1975-11-12 | 1978-01-24 | Stefan Oh Witte | Equipment for surface treatment |
FR2422449A1 (en) * | 1978-04-14 | 1979-11-09 | Air Ind | Cleaning workpiece carriers in electrostatic enamelling plant - via air operated hammer vibrating carrier so enamel powder falls off carrier surface |
US4668358A (en) * | 1986-05-14 | 1987-05-26 | Motor Wheel Corporation | Method and apparatus for use in surface treatment of conveyor supported workholders |
WO1996026406A1 (en) * | 1995-02-24 | 1996-08-29 | Grass America, Inc. | System for cleaning fixtures utilized in spray painting |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6261435B1 (en) * | 1997-10-21 | 2001-07-17 | Nihon Techno Kabushiki Kaisha | Plating method |
-
1999
- 1999-03-18 GB GBGB9906136.8A patent/GB9906136D0/en not_active Ceased
-
2000
- 2000-03-17 GB GB0121756A patent/GB2366530B/en not_active Expired - Fee Related
- 2000-03-17 EP EP00912746A patent/EP1161304A1/en not_active Withdrawn
- 2000-03-17 WO PCT/GB2000/000947 patent/WO2000054889A1/en not_active Application Discontinuation
-
2001
- 2001-03-17 US US09/936,958 patent/US20020137442A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4069790A (en) * | 1975-11-12 | 1978-01-24 | Stefan Oh Witte | Equipment for surface treatment |
FR2422449A1 (en) * | 1978-04-14 | 1979-11-09 | Air Ind | Cleaning workpiece carriers in electrostatic enamelling plant - via air operated hammer vibrating carrier so enamel powder falls off carrier surface |
US4668358A (en) * | 1986-05-14 | 1987-05-26 | Motor Wheel Corporation | Method and apparatus for use in surface treatment of conveyor supported workholders |
WO1996026406A1 (en) * | 1995-02-24 | 1996-08-29 | Grass America, Inc. | System for cleaning fixtures utilized in spray painting |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2374304A (en) * | 2001-04-10 | 2002-10-16 | Protective Finishing Group Ltd | Support member for electrostaic coating |
WO2002083319A1 (en) | 2001-04-10 | 2002-10-24 | Protective Finishing Group Ltd | A support member for use in a coating process, a method of removing surface coating material from a support member, a method of making a plurality of support members |
GB2374304B (en) * | 2001-04-10 | 2005-03-16 | Protective Finishing Group Ltd | A support member, a rack for use in a coating process, a method of removing surface coating material from a support member, |
GB2380437A (en) * | 2001-10-03 | 2003-04-09 | Protective Finishing Group Ltd | Support member for electrostatic coating |
GB2380436A (en) * | 2001-10-03 | 2003-04-09 | Protective Finishing Group Ltd | A carrier for use in a coating process |
GB2380437B (en) * | 2001-10-03 | 2005-02-09 | Protective Finishing Group Ltd | Improvements relating to coating processes |
GB2380436B (en) * | 2001-10-03 | 2005-02-23 | Protective Finishing Group Ltd | A carrier for use in a coating process,a method of making a carrier and support members for use in a coating process and a method of removing surface coating |
Also Published As
Publication number | Publication date |
---|---|
GB2366530A (en) | 2002-03-13 |
GB2366530B (en) | 2003-08-13 |
US20020137442A1 (en) | 2002-09-26 |
GB9906136D0 (en) | 1999-05-12 |
GB0121756D0 (en) | 2001-10-31 |
EP1161304A1 (en) | 2001-12-12 |
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